<template>
  <div>
    <!-- 面包屑导航 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片视图 -->
    <el-card>
      <el-row>
        <!-- 添加角色 -->
        <el-button type="primary">添加角色</el-button>
      </el-row>
      <!-- 角色列表页 -->
      <el-table :data="roleList" border stripe>
        <el-table-column type="expand">
          <template slot-scope="scope">
            <el-row
              :key="item1.id"
              v-for="(item1,index) in scope.row.children"
              :class="['bdbottom',index===0?'bdtop':'' ,'vcenter']"
            >
              <!-- 渲染一级权限 -->
              <el-col :span="5">
                <el-tag closable @close="removeRightById(scope.row,item1.id)">{{item1.authName}}</el-tag>
                <i class="el-icon-caret-right"></i>
              </el-col>
              <!-- 渲染二级和三级权限 -->
              <el-col :span="19">
                <!-- 通过循环渲染二级权限 -->
                <el-row
                  :class="[i2===0?'':'bdtop','vcenter']"
                  :key="item2.id"
                  v-for="(item2,i2) in item1.children"
                >
                  <el-col :span="6">
                    <el-tag
                      type="success"
                      closable
                      @close="removeRightById(scope.row,item2.id)"
                    >{{item2.authName}}</el-tag>
                    <i class="el-icon-caret-right"></i>
                  </el-col>
                  <el-col :span="18">
                    <el-tag
                      type="warning"
                      v-for="(item3) in item2.children"
                      :key="item3.id"
                      closable
                      @close="removeRightById(scope.row,item3.id)"
                    >{{item3.authName}}</el-tag>
                  </el-col>
                </el-row>
              </el-col>
            </el-row>
          </template>
        </el-table-column>
        <el-table-column type="index"></el-table-column>
        <el-table-column label="角色名称" prop="roleName"></el-table-column>
        <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
        <el-table-column label="操作" width="300px">
          <template slot-scope="scope">
            <el-button type="primary" icon="el-icon-edit" size="mini">编辑</el-button>
            <el-button type="danger" icon="el-icon-delete" size="mini">删除</el-button>
            <el-button
              type="warning"
              icon="el-icon-setting"
              size="mini"
              @click="showSetRightDiolog(scope.row)"
            >分配权限</el-button>
          </template>
        </el-table-column>
      </el-table>
    </el-card>
    <!-- 分配权限 -->
    <el-dialog
      title="分配权限"
      :visible.sync="setRightDiologVisiable"
      width="50%"
      @close="showRightDiologClosed"
    >
      <el-tree
        :data="rightsList"
        :props="treeProps"
        show-checkbox
        node-key="id"
        default-expand-all
        :default-checked-keys="defKeys"
        ref="treeRef"
      ></el-tree>
      <span slot="footer" class="dialog-footer">
        <el-button @click="setRightDiologVisiable= false">取 消</el-button>
        <el-button type="primary" @click="allotRights">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>
<script>
export default {
  // eslint-disable-next-line space-before-function-paren
  data() {
    return {
      // 权限列表
      roleList: [],
      setRightDiologVisiable: false,
      //   所有权限数据
      rightsList: [],
      treeProps: {
        label: 'authName',
        children: 'children'
      },
      defKeys: [],
      roleId: ''
    }
  },
  // eslint-disable-next-line space-before-function-paren
  created() {
    //   获取权限
    this.getRloesList()
  },
  methods: {
    // eslint-disable-next-line space-before-function-paren
    async getRloesList() {
      const { data: res } = await this.$http.get('roles')
      if (res.meta.status !== 200) {
        return this.$message.error('获取角色列表失败')
      }
      this.roleList = res.data
      //   console.log(this.roleList)
    },
    // eslint-disable-next-line space-before-function-paren
    async removeRightById(role, rightId) {
      const confirmRight = await this.$confirm(
        '此操作将永久删除该文件, 是否继续?',
        '提示',
        {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }
      ).catch(err => err)
      if (confirmRight !== 'confirm') {
        return this.$message({
          type: 'info',
          message: '已取消删除'
        })
      }
      const { data: res } = await this.$http.delete(
        `roles/${role.id}/rights/${rightId}`
      )
      if (res.meta.status !== 200) {
        return this.$message.error('删除权限失败')
      }
      //   会重新渲染页面
      //   this.getRloesList()
      role.children = res.data
    },
    // 展示分配权限
    // eslint-disable-next-line space-before-function-paren
    async showSetRightDiolog(role) {
      this.roleId = role.id
      // 获取权限数据
      const { data: res } = await this.$http.get('rights/tree')
      this.setRightDiologVisiable = true
      if (res.meta.status !== 200) {
        return this.$message.error('获取权限数据失败')
      }
      this.rightsList = res.data
      console.log(this.rightsList)
      this.getLeafKeys(role, this.defKeys)
      this.setRightDiologVisiable = true
    },
    // 通过递归获取三级权限列表
    // eslint-disable-next-line space-before-function-paren
    getLeafKeys(node, arr) {
      if (!node.children) {
        return arr.push(node.id)
      }
      node.children.forEach(item => this.getLeafKeys(item, arr))
    },
    // eslint-disable-next-line space-before-function-paren
    // 重置defKeys
    // eslint-disable-next-line space-before-function-paren
    showRightDiologClosed() {
      this.defKeys = []
    },
    // eslint-disable-next-line space-before-function-paren
    async allotRights() {
      const keys = [
        ...this.$refs.treeRef.getCheckedKeys(),
        ...this.$refs.treeRef.getHalfCheckedKeys()
      ]
      const idStr = keys.join(',')
      const { data: res } = await this.$http.post(
        `roles/${this.roleId}/rights`,
        { rids: idStr }
      )

      if (res.meta.status !== 200) {
        return this.$message.error('分配权限失败！')
      }

      this.$message.success('分配权限成功！')
      this.getRloesList()
      this.setRightDiologVisiable = false
    }
  }
}
</script>
<style lang="less" scoped>
.el-tag {
  margin: 10px;
}
.bdtop {
  border-top: 1px solid #eee;
}
.bdbottom {
  border-bottom: 1px solid #eee;
}
.vcenter {
  display: flex;
  align-items: center;
}
</style>
